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MODEL 19
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35 pages
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Mod
el 19 MICR
O R METER
Tech
nical Ma
nual
Ludlum Measurements, Inc.
February 2012
Recycling
8
Parts Li
st
9
Model 19 Micro R Meter
9-1
Main Board, Drawing 367 × 166
9-1
Wiring Diagram, Drawing 367 × 174
9-4
Drawi
ngs and Diag
rams
10
4
6
Table of Contents
Main Page
Default Chapter
4
Table of Contents
4
Introduction
6
Getting Started
7
Unpacking and Repacking
7
Battery Installation
7
Operational Check
8
Maintenance
9
Recalibration
9
Batteries
9
Specifications
11
Identification of Controls and Functions
12
Safety Considerations
14
Environmental Conditions for Normal Use
14
Warning Markings and Symbols
14
Cleaning and Maintenance Precautions
15
Troubleshooting
16
Troubleshooting Electronics Which Utilize a Scintillation Detector
16
Technical Theory of Operation
18
Detector
18
Input
18
Amplifier
18
Discriminator
18
Audio
19
Scale Ranging
19
Digital Analog Converter
19
Meter Drive
19
Fast/Slow Time Constant
19
Low Voltage Supply
19
High Voltage Test
19
High Voltage Supply
20
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